Type-casting machine.



P. SALLY.

TYPE CASTING MACHINE. APPLICATION FILED mum, 1913.

0a 1 9 1 5 2 V m d o O 6 t w MM 0 P COLUMBIA PLANOGRAPH co. WASHINGTON, n, c

rrnn STATES PATENT OFFICE.

FRANK SALLY, OF MOUNT VERNON, NEW YORK, ASS IGNOR '10 LANSTON MONOTYPE MACHINE COMPANY, OF PHILADELPHIA,PENNSYLVANIA, A CORPORATION OF VIRGINIA.

TYPE-CASTING MACHINE.

Specification of Letters Patent.

Patented Nov. 25, 1913.

Application filed February 8, 1913. Serial No. 747,144.

To all whom it may concern Be it known that I, FRANK SALLY, of Mount Vernon, in the county of Westchester and State of New York, have invented a certain new and useful Improvement in Type-Casting Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, and to the figures and letters of reference marked thereon.

This invention relates to the class of type casting machines in which fluid metal is injected into the mold under pressure through a nozzle or like means removably applied to the mold for a short period during each complete cycle of operations. As is well known the temperature of the mold must be maintained below that of the in jected metal in order that the latter may be caused to quickly set or solidify,'to which end the mold is usually supplied with a cooling system in the form of a water circulation. It is equally well known that in order to prevent chilling of the metal and the consequent obstruction of the passage, the tip of the nozzle or that part which temporarily contacts with the mold must be maintained at a relatively high temperature, one equaling or exceeding that of the molten metal.

The requisite differential temperature between the mold and nozzle can readily be established and maintained so long as those members are separated; but immediately they are brought into contact there is induced a tendency to equalize whereby the temperature of the mold is increased and that of the nozzle reduced proportionally. It is obvious that the longer contact is maintained the greater the reduction of tempera ture at the nozzle; hence in practice such con tact is minimized, to prevent fouling. In commercial machines the duration of contact between the nozzle and mold is but a fraction of the cycle of operations performed for each cast and it together with the water circulation are standardized for type of twelve point and under, that is to say, the timing is such that at a maximum speed no undue heating of the mold or chilling of the nozzle will be produced so long as the volume of metal injected during a cycle is not materiallyin excess of the heat dissipating capacity of the mold.

The heat transference by the injected metal is another disturbing element, which, varying as it does with the size of the produced type, and supplementing that incident to the contact of the nozzle with the mold, seriously affects the action of the latter when dimensioned to produce the larger sizes of type, and a remedy has been sought through a reduction in the speed of the machine; but while this prolongs the cooling period for the mold, it correspondingly. increases the duration of contact be tween the mold and nozzle, and consequently a compromise is necessary to prevent chilling the metal in the nozzle.

Now the present invention is designed to overcome the difliculty by providing a means whereby, without changing the speed of the machine, hence the duration of contact between the nozzle and mold, the interval between successive applications of the nozzle is prolonged or increased, as is also the cooling'period of the mold, so that types of the larger dimensions may be produced upon commercial machines originally designed for type of twelve point or under. These objects are obtained in the present instance by the addition of a variable timing mechanism between the driving shaft and pump actuating and nozzle seating mechanism, whereby the seating of the nozzle on the mold is suspended or prevented during one or more casting cycles intermediate successive productive cycles, thereby increas ing the cooling period of the mold two or more times without any increase in the contacting period of the mold and nozzles.

In the accompanying drawings, illustrating a preferred form of embodiment of the invention: Figure l is a front elevation, partly in section, of a type machine with the improvement applied thereto; Fig. 2 is a perspective view of the timing attachment attached; Fig. 3 is a face .view of the timing cam; Fig. 4: is a sectional view through a portion of the adjustable cam abutment and its supporting lever.

Similar numerals indicate like parts in the several views.-

The machine with which the improveshafts.

The nozzle is normally separated from the mold and is applied thereto (during a short interval while the cast is being made) through the action of pump actuating devices, this latter including a lock-out or means whereby the action of said pump actuating and nozzle seating mechanism can be manually interrupted or suspended. This lock-out mechanism is represented in the drawings by the look-out rod 1 which latter, when drawn out by hand, temporarily disconnects the nozzle actuating devices from theirprime mover, the latter represented by the twin cam shafts 2, all as will fully appear by reference to Patent No. 625,998, Reissue No. 12,819, and Patent No. 67 1,374, dated'May 21, 1901, the last named illustrating the more improved form of pump actuating mechanism and cut-out devices therefor as embodied in commercial machines of the present period.

As the present improvements have relation mainly to means for automatically con trolling what is known as the pump lock out, represented in this instance by actuating rod 1, it is not deemed advisable or necessary to enter into a detailed description of the type casting machine proper, reference being had for this purpose to the hereinbefore mentioned patents.

To the frame of the machine is detachably secured a bearing block 3 on which is fulcrumed a lever 1 embracing the trip rod 1 and confined thereto between two adjustable collars 5, 6. Detachably secured to the frame is a pin or journal 7 on which is mounted a revoluble cam 8 containing a plurality of sets or series of flights or projections 10, 11 and 12, each set adapted to engage an arm or abutment 9 adjustably secured to lever a when said arm is in register with the selected set. In the example illustrated, cam 8 is furnished with three sets or series of flights 10, 11, 12, although it may contain more or less than three as circumstances require. The inner set of flights 10 are relatively short and two in number; the intermediate set 11 are longer and two in number; and the outer set 12 includes three flight-s. The cam disk or cylinder 8 is provided with ratchet teeth 13 engaged by a pawl 14: carried by an arm 15, the latter pivoted upon pin 7 and provided with a connecting rod 16 passing through a swivel bearing 17 carried on a crank arm 18 detachably secured to one of the cam shafts 2, said rod 16 being provided with two adjustablecollars or stops 19, one on either side of bearing 17.

The parts are so proportioned and arranged that at each complete rotation of driving shaft 2 pawl 14 will make a complete reciprocation with an interval of rest at each end of its excursions in opposite directions.

When the look-out mechanism of Patent No. 674,374 is employed the movements of the pawl carrying arm are so timed that its forward or active stroke will occur during the active period of the nozzle actuating mechanism, as, in this instance, the part operated upon by the present mechanism is in the form of a gag block 2'. e. latch 226 of Patent 625,998 which, being interposed during the casting movement, enables the pump actuating mechanism to lock itself out on the return movement, which locked-out position continues so long as rod 1 is held in its outermost position of adjustment.

By adjustment abutment 9 can be set in the path of either series of cam flights. The outer set 10 contains three members, each approximately equal in length to the interval between succeeding ratchet teeth 13 and spaced apart the same distance, so that when the abutment 9 is set opposite said set it will be operated upon during alternate revolutions of the driving shaft to shift the lockout rod 1 and retain it in the locked out position, thereby prolonging the cooling period of the mold during the revolution of the shaft next succeeding each cast. It is to be noted that in this machine the type is discharged from the mold durin one cycle or revolution of the driving shaft, and in this respect increasing the effectiveness of this idle revolution by the removal of one of the heating elements from the mold.

The inner set of flights 12 is composed of two corresponding members oppositely disposed and each of a length approximating the distance between adjacent ratchet teeth 13, whereby the abutment 9 if located opposite this set will be operated upon to lock-out the nozzle and pump actuating mechanism during every third rotation of the driving shaft, so that the added cooling period will occur in the interval between each two successive casts.

The intermediate set of flights 11 are two in number symmetrically disposed on opposite sides of the center of rotation and each of a length approximately equal to the space covered by two adjacent ratchet teeth 13, the proportions being such that when abutment 9 is brought into alinement it will operate upon the look-out during the passage of two successive teeth of the ratchet, thereby extending the added cooling period over two out of every three successive rotations of the driving shaft. a

It is obvious that by a simple modification or extension of the system the added cooling period may be varied both in frequency and duration by changing the pitch of the ratchet, the lengths of the flights, or both.

The three proportions indicated have been found sufiicient for casting type varying from fourteen to thirty six point, the two lock-outs to one casting arrangement being employed for the larger, the one-lockout to two casts for the smaller, and the one to one for intermediate sizes.

Having thus described the invention, What is claimed as new, is:

1. In a type cas ting machine provided with driving shaft and a pump lock-out actuating means, and in combination therewith, a variable timing mechanism controlling said lock-out actuating means, and means for coupling said timing mechanism with the driving shaft of the casting machine for varying the timing of the pump lock action with relation to the driving shaft.

2. In a type casting machine provided with a pump lock-out controlling means, and in combination therewith, a variable timing mechanism adapted to be coupled with said controlling means for temporarily suspending the action of the pump mechanism during one or more revolutions of the driving shaft, said timing mechanism being connected in timed relation to and deriving motion from said driving shaft.

8. In a type casting machine provided with a pump lock-out controlling means,

and in combination therewith, a timing mechanism for actuating said controlling means the same including a ratchet mechanism deriving motion from the driving shaft, a cam connected with said ratchet mechanism, and an abutment coupled with the pump lock-out controlling means and operated upon by said cam.

4. In artype casting machine such as described, organized to produce a cast at each revolution of the driving shaft and provided with a shiftable pump lock-out controlling means for suspending the action of the metal injecting mechanism, and in combination therewith a timing mechanism interposed between said lock-out controlling means and the driving shaft of the casting machine and deriving motion from said driving shaft, said timing mechanism being provided With means for varying the ratio between the rotation of the driving shaft and the shifting of said lock-out controlling means.

5. In a type casting machine provided with a lock-out actuating means for temporarily suspending the action of the metal injecting mechanism and in combination therewith a timing mechanism coupled with the driving shaft and acting upon said lockout actuating means, to shift the latter, the

same including a driving ratchet, a plurality of series or sets of cam flights, and p a transmitting abutment adapted to be set in register with either set of camfllghts.

FRANK SALLY.

WVitnesses JAMES P. MOMAHON, JoI-rN HUNTING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

